Cutting bevel-wheel teeth.



S. SUNDERLAND & A. M. IVHDGLEY.

CUTTING BEVEL WHEE L TEETH. APPLICATION FILED 0CT.29, 1917.

Patented Dec. 3, 1918.

5 SHEETSSHEET 1.

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S. SUNDERLAND & A. M. NjlDGLEY..

CUTTING BEVEL WHEEL IE'ETH.

APPLICATION FILED OCT. 29, 1917.

Patented Dec. 3, 1918,

5 SHEETS SH.EET 3.

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CUTTING BEVEI. WHEIEL TEETH.

APPLICATION FILED OCT-29,19I7.

Patented Dec. 3, 1918.

mwasa 5 SHEETS-SHEET 4.

S. SUNDERLAND & A. M. MIDGLEY. CUTTING BEVEL WHEEL TEETH.

, APPLICATION FILED 0cT.29, 1911. l 1,286,832. Patented Dec. 3,1918.

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. SAM SUNDERLAND, OF HIGH UTLEY, KEIGHLEY, AND ARTHUR MAURICE IvIIDGLEY, OF

SUTTON-IN-CBAVEN, NEAR KEIGHLEY, ENGLAND.

CUTTING BEVEL-WHLEL TEETH.

Specification of Letters Patent.

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Application filed October 29, 1917. Serial No. 199,163.

To all whom it may concern:

Be it known that we, SAi\r SUNDERLAND, a subject of the King of Great Britain and Ireland, residing at High Utley, Keighley, in the county of York, England, and ARTHUR MAURICE MIDGLEY, a subject of the King of Great Britain and Ireland, residing at Holly Bank, Sutton-in-Craven, near Keighley aforesaid, have jointly invented a certain new and useful Improvement in Outting Bevel-Wheel Teeth, of which the fol- This invention relates to bevel Wheel cutmachines and has for its object to provide means whereby the cutter carrying plates may be operated in a direct and effective. manner. Tlieseplates are so combined with a rotary former plate that said .plate acts directly upon thefree ends of the pivoted frames, which carry the recipro eating cutters, andduring the cutting of the bevel wheel teeth spaces are positively guided in accordance with the periphery-or" the former plate.

In describing our invention in detail, re- -ference is made to the accoinpaying sheets of drawings, in which Figure 1 represents .a side elevation of a bevel wheel cutting machine, to which-our invention is added. Fig. 2 is a' plan of the machine. Fig. 3 is elevation looking to the right or" Fig. l, the swiveling pedestal carrying the Wheel blank being shown at right angles to the rccipro ca'ti-ng cutter plates in order to simplify the drawings. Fig. 4 is a detached front View of the reciprocating cutter plates adapted to carry tool boxes of the ordinary description. Fig. 5 is a sectional View through line aof Fig. 4 showinghow the sliding cutter plates may be supporter. Fig. 6 is a detached view drawn to' a larger scale, showing the curved slot in reciprocating plate; Fig. 7 a view of the opposite side oi plate, showing the straight vert-ical slot. Fig. 8 is a detached plan View partly in section, showing the disk crank and engagement with vertical slot in reciprocating plate. Fig. 9 is a'plan view of a shaft with a gear and collar mounted thereon showing the amount of movement the collar may have. Fig l0 is a vertical section of Fig. 9. Figs. 11, 12 and ldrepresent respectively a sectional elevation, plan: and elevation of a, right and lefthand screw-threaded bar. i

I"; carrying out our invention, we utilize 22, associated in the usual manner a bevel wheel teeth cutting machine of the type such as shown by the drawings, in which the bevel wheel blank 1, is secured to a spindle 2, supported by an adjustable pedestal 3, bolted to a swiveling plate 4, at tached to ring segment 5, adapted to be moved'to and fro in its circular path, moving the wheel. blank 1, into and out of engagement wlth the reciprocating tools 6, the distance as may be required by the pitch and depth of tooth spaces to be cut.

The movement of ring segment 5. in its circular path, may be effected by a rotating worm 7, secured on shaft 7", the worm meshing with toothed segment 8, attached to ring segment 5, said shaft being rotated in both directions in the manner nereinafter described.

This rotation'may be cficctedduring the teeth space cutting process, by a chain 9' engaging with sprocket wheels 10 and 11, the former wheel being rotated, by suitable connections with. the shaft upon which'the step driving pulley 12 is secured.

Sprocket-wheel 11, is secured to sleeve 13 freely mounted on shaft teeth space cutting process, the clutch teeth 14', engage with like teeth on one end of sleeve 15,111; shown Fig. 1, said sleeve being feather keyed on shaft 7*.

Each end oi sleeve 15 is provided with clutch teeth, those at 16 engaging with like teeth, l7, on sleeve of bowl wheel 18, so that on the-sliding of bar 19 toward the right, on the completion ot the cutting of each tooth space, the rotation of shaft 7 is reversed, and ring segment 5 operated in the opposite direction to that shown by curved arrow in Fig. 2, the continuous rotation of bevel eil'ected by geared connections 20, see Fig. driven-by a separate belt.

The friction pulley 21, is of the usual type of construction, revolving along with sleeve with the indexing change gears 23of the spacing device, the rotation. of which is periodically prevented by any of the Well known arrangements applied during the cutting of a tooth space, during which time, the ring segment is moving in the direction shown by the curved arrow. in Fig. 2.

When a tooth space been cut to the required depth, the dog 24, bolted to ring segment 5, on coming in contact with an ex- 7*, and during the Y lltl ' tension from collar slides said bar-toward the right, thereby slid-- .ing sleeve 15,

C. secured on bar 19,

' space.

The'description so far applies to a machine suitable for working in combination with our invention which is added thereto; to this machine apart from the combination with our invention no claim is made.

The essential features of the invention are to arrange mechanism for cutting tooth 8, each having a circular end v 36, sufiicient to spaces in wheel blanks, by the employment of two cutters mounted side by side acting simultaneously on the wheel blank, thecutters moving toward each other as controlled of a revolutionin each direction. 1

The step cone pulley is keyed upon'a shaft upon which is secured a pinion (not shown by the drawings) meshing with a spur wheel 25, keyed upon a shaft 26, see Fig. 8, to which is secured a disk 27, provided with a crank pin 28, carrying a sliding block engaging witli a straight vertical slot 29, cut

by a former plate adapted to be rotated part in plate 30, to which a reciprocating motionis imparted on the rotation of crank disk 27.

T is plate is also provided with a-curved slot 31, of quicker curvature than would be the case ifthe curve was struck from the center of circular pin 32, see Figs. 2 and 8, the pin being utilized for supporting one end of the upper and lower reciprocating slide carrying frames 33 and frame 34, being provided with an extending arm 35, from which is suspended a Weight cause the upward tendency of slide carrying frame 34, to be about equal to the gravity or downward tendency of the upper frame 33, thus I by these means equalizing the pressure on the former plate- 37, applied and operated in the manner as hereinafterdescribed. a

Each pivoted frame 33 and 34 is provided with a reciprocating plate 38, each plate adapted to carry a tool box 39 of suitable description to which cutters 6 are secured.-

Projecting from the rear of each plate is a bar 40 integral therewith, see Figs. 5 and carrying a block 41, engaging. with the before mencation ofplate 30,, a like movement is imparted to the tool box 39, carrying plates 38, and by the curvature of slot 31 being struck at a. less radius than from the center of circular pin 32. The quickness of the curve insures the pressure of the slide carrying 34, the lower portions 'fraines and 34 upon the periphery of the allowing a free reciprocatformer plate 37, 38, the guiding of mg movement to plates these plates and recess R- extending to three-fourths the cir l by which ,arr

cumference of said wheel, 7 rangcment the skew toothed-wheel 42, may

in the upper face of wheel 42, the" free ends of slide carrying frames being controlled as to distance apart is secured a circular collar '44,

make nearly one-half of a revolution in.

either directioin'without affecting the rotation of vertical shaft 43, to the of which is secured a worm 45 meshing With a worm wheel 46 freely mounted on the horizontal shaft carrying the former plate, supported by the tubular bracket B,

adapted to swivel to some extent around the upper portion vertical shaft 43, in order to facilitate the changing of former plates suitably mounted and secured to shaft 47.

Worm wheel 46 is provided with clutch teeth meshing with those cutin circular block 48, the block being feather keyed on shaft 47, the clutch teeth being held in mesh on the tightening of nut-N. 0n the liberation of this nut circular block 48 may be withdrawn clear of the clutch teeth out in worm wheel 46, enabling the position of former plate 37 to be adjusted in a circular direction to the required position by the tilrning of horizontal shaft 47.

As before mentioned, one 'end of frames;

33 and 34 is supported by circular pin 32,

leaving the opposite end of frames-free for adjustment as to distance apart on turning the right and left hand screw threaded bar 49, as required to suit the angle of the bevel wheel Each'frame is able bracket 50, carrying anti-friction rollto be cut.

ers 51, engaging with the upper and lower of former plate 37,-; plate on turning inguides the free ends of.v frames 33 and .34, on the rotation of former of periphery see Fig.3; The former a rotary direction,

plate by vertical shaft 43. I

When a tooth space has been cut to the depth required, as before stated, the ring segment 5 is moved in the direction opposite arrow inFig' to that shown by the curved 2, during which period the rotation of the former plate is stopped until pin vP enga es with the opposite end of recess B, there y pitch and jco'ne Y providedvwith an adjust I turning the former plate back to its original position before commencing to out another tooth space.

eas es During this reversal, shaft 22 is liberated in the ordinary manner, and the wheel blank 1 is turned in a rotary direction equal to the pitch of the teeth being out, on the completion of which, the ring segment 5, is moved in the direction shown by the curved arrow in Fig. 2, thereby bringing into contact the wheel blank 1 with the reciprocating cutters 6.

Immediately the Wheel blank arrives in contact with the cutters 6, the pin P will have arrivedat the opposite end of recess R, putting into operation the rotation the former plate 37, thereby guiding the frames 33 and 34, in accordance with the periphery of former plate, when the cycle of operations is repeated.

By stopping the rotation of vertical shaft- 43, for a. period before the engagement of cutting tools 6, with wheel blank 1, any back lash there may be in the gears operating the wheel blank and former plate is removed before the cutting tools 6 engage with the wheel blank, thus securing accuracy in cutting, the teeth spaces.

The free ends of the slide carrying frames 33 and 3-1 are adjusted to the proper distances apart to suit 'the thickness of the teeth to be cut relative to the pitch, said frames being separated on the rotation of graduated hand wheel 52, see Figs. 11, 12 and 13, representing respectively a sectional elevation, plan and elevation of the right and left hand screw threaded bar 49. The nuts 53 of the threaded bar 49 are not attached to the slide carrying frames 33 and 34, but the frames are provided with projections on the inner surface, one on each frame,'in a position adapted to engage with projections 54, on nuts 53, so that on the rotation of the threaded bar 49 the position or degree of angularity of the slide carrying frames 33 and 34, and cutters 6 as to distance apart will be adjusted to suit the thickness of the teeth to be cut, the periphery of the rotary former plate 37 controlling the frames 33 and 34, and cutters 6 during the cutting of the bevel wheel teeth.

Antifriction rollers 51 are in contact with the plate 37, being held thereto by nuts 55. lVhen this is accomplished, the threaded bar i9 is turned in the opposite direction sliding the nut projections 54 clear of the projections on the inner surfaces of pivoted frames 33 and 34 leaving said frames free to be operatedin accordance with the periphery of former plate 37.

lVhat we claim our invention is 1. In a bevel wheel cutting machine, a ring segment adapted to be moved. to and fro, a swiveling plate having an adjustable pedestal attached thereto, a spindle for carrying the wheel blank supported by said pedestal, a plate provided with vertical and curved slots, means for reciprocating said plate, a former plate, frames pivoted at one end to a circular pin and having their oppo siteends free to engage with the periphery of a rotary former plate, slides supported by said frame and means for operating the slides, substantially as described.

2. A bevel wheel cutting machine comprising a ring-segment adapted to be moved to and fro, a swiveling plate having an adjustable pedestal attached thereto, a spindle for carrying. the wheel blank supported by said pedestal, a plate provided with vertical and curved slots, means for reciprocating said plate, a former plate, ieans for delaying the rotary movement at the commencement and termination of each series of cuttings of teeth spaces, a circular pin, frames pivoted at' one end to the circular pin, and having their opposite end free to engage with the periphery of the former plate, slides supported by said frames and means for operating the slides, substantially as described.

In witness whereof we have hereunto set our hands in the presence of two witnesses.

SAli'i SUNDERLAND. ARTHUR lllriUR-IGE MlDGLEY.

Witnesses ALrnnn DUNN, Jenn GILL. 

